GENERAL TORQUE SPECIFICATION CHART FOR I.S.O.** METERIC FASTENERS***(when SAE 10 oil is used as a lubricant

Minimum
Tensile
Strength

kg/mm2
P.S.I.

40

50

60

80

100

120

56900

71100

85340

113800

142200

170700

Proof

kg/mm2

22.6

29.1

28.2

36.4

33.9

43.7

47.5

58.2

79.2

95

Load

P.S.I.

32150

41390

40110

51770

48220

62160

67560

82780

112650

135130

Property Class

4.6

4.8

5.6

5.8

6.6

6.8

6.9

8.8

10.9

12.9

Bolt Diameter

Figures are KILOGRAM METER except those that are bolded which are KILOGRAM CENTEMETER

Metric

Inch

6mm

0.236

49

63

61

79

74

95

103

126

172

206

8mm

0.315

119

153

148

191

178

230

250

306

417

500

10mm

0.394

235

303

294

379

353

455

495

606

8.2

10

12mm

0.472

411

529

427

662

616

7.9

8.6

10.5

14

17

14mm

0.551

654

8.4

8.2

10.5

10

12

13

17

23

27

16mm

0.63

10

13

12

16

15

20

21

26

36

43

18mm

0.709

14

18

17

23

21

27

30

36

49

59

22mm

0.866

27

35

34

44

41

52

57

70

95

114

*** NOTE: Use
only when manufacture's specifications are not available, these values are
for stiff metal-to-metal joints and are based on 90% of proof load. DO NOT
USE for gasket joints or joints of soft materials
** I.S.O.= International Standardization Organization.